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mac80211: backport today's brcmfmac changes

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This fixes various problems with parsing platform NVRAM. It's required
to get BCM43602 working in most cases.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45802
This commit is contained in:
Rafał Miłecki
2015-05-28 10:39:11 +00:00
parent 597d2060c5
commit c1cc2217c2
5 changed files with 323 additions and 0 deletions
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102
package/kernel/mac80211/patches/373-brcmfmac-avoid-null-pointer-access-when-brcmf_msgbuf.patch Normal file
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@@ -0,0 +1,102 @@
From: Arend van Spriel <arend@broadcom.com>
Date: Tue, 26 May 2015 13:19:46 +0200
Subject: [PATCH] brcmfmac: avoid null pointer access when
brcmf_msgbuf_get_pktid() fails
The function brcmf_msgbuf_get_pktid() may return a NULL pointer so
the callers should check the return pointer before accessing it to
avoid the crash below (see [1]):
brcmfmac: brcmf_msgbuf_get_pktid: Invalid packet id 273 (not in use)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
IP: [<ffffffff8145b225>] skb_pull+0x5/0x50
PGD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: pci_stub vboxpci(O) vboxnetflt(O) vboxnetadp(O) vboxdrv(O)
snd_hda_codec_hdmi bnep mousedev hid_generic ushwmon msr ext4 crc16 mbcache
jbd2 sd_mod uas usb_storage ahci libahci libata scsi_mod xhci_pci xhci_hcd
usbcore usb_common
CPU: 0 PID: 1661 Comm: irq/61-brcmf_pc Tainted: G O 4.0.1-MacbookPro-ARCH #1
Hardware name: Apple Inc. MacBookPro12,1/Mac-E43C1C25D4880AD6,
BIOS MBP121.88Z.0167.B02.1503241251 03/24/2015
task: ffff880264203cc0 ti: ffff88025ffe4000 task.ti: ffff88025ffe4000
RIP: 0010:[<ffffffff8145b225>] [<ffffffff8145b225>] skb_pull+0x5/0x50
RSP: 0018:ffff88025ffe7d40 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88008a33c000 RCX: 0000000000000044
RDX: 0000000000000000 RSI: 000000000000004a RDI: 0000000000000000
RBP: ffff88025ffe7da8 R08: 0000000000000096 R09: 000000000000004a
R10: 0000000000000000 R11: 000000000000048e R12: ffff88025ff14f00
R13: 0000000000000000 R14: ffff880263b48200 R15: ffff88008a33c000
FS: 0000000000000000(0000) GS:ffff88026ec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 000000000180b000 CR4: 00000000003407f0
Stack:
ffffffffa06aed74 ffff88025ffe7dc8 ffff880263b48270 ffff880263b48278
05ea88020000004a 0002ffff81014635 000000001720b2f6 ffff88026ec116c0
ffff880263b48200 0000000000010000 ffff880263b4ae00 ffff880264203cc0
Call Trace:
[<ffffffffa06aed74>] ? brcmf_msgbuf_process_rx+0x404/0x480 [brcmfmac]
[<ffffffff810cea60>] ? irq_finalize_oneshot.part.30+0xf0/0xf0
[<ffffffffa06afb55>] brcmf_proto_msgbuf_rx_trigger+0x35/0xf0 [brcmfmac]
[<ffffffffa06baf2a>] brcmf_pcie_isr_thread_v2+0x8a/0x130 [brcmfmac]
[<ffffffff810cea80>] irq_thread_fn+0x20/0x50
[<ffffffff810ceddf>] irq_thread+0x13f/0x170
[<ffffffff810cebf0>] ? wake_threads_waitq+0x30/0x30
[<ffffffff810ceca0>] ? irq_thread_dtor+0xb0/0xb0
[<ffffffff81092a08>] kthread+0xd8/0xf0
[<ffffffff81092930>] ? kthread_create_on_node+0x1c0/0x1c0
[<ffffffff8156d898>] ret_from_fork+0x58/0x90
[<ffffffff81092930>] ? kthread_create_on_node+0x1c0/0x1c0
Code: 01 83 e2 f7 88 50 01 48 83 c4 08 5b 5d f3 c3 0f 1f 80 00 00 00 00 83 e2
f7 88 50 01 c3 66 0f 1f 84 00 00 00 00 00 0f 1f
RIP [<ffffffff8145b225>] skb_pull+0x5/0x50
RSP <ffff88025ffe7d40>
CR2: 0000000000000080
---[ end trace b074c0f90e7c997d ]---
[1] http://mid.gmane.org/20150430193259.GA5630@googlemail.com
Cc: <stable@vger.kernel.org> # v3.18, v3.19, v4.0, v4.1
Reported-by: Michael Hornung <mhornung.linux@gmail.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
---
--- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
@@ -500,11 +500,9 @@ static int brcmf_msgbuf_query_dcmd(struc
msgbuf->rx_pktids,
msgbuf->ioctl_resp_pktid);
if (msgbuf->ioctl_resp_ret_len != 0) {
- if (!skb) {
- brcmf_err("Invalid packet id idx recv'd %d\n",
- msgbuf->ioctl_resp_pktid);
+ if (!skb)
return -EBADF;
- }
+
memcpy(buf, skb->data, (len < msgbuf->ioctl_resp_ret_len) ?
len : msgbuf->ioctl_resp_ret_len);
}
@@ -866,10 +864,8 @@ brcmf_msgbuf_process_txstatus(struct brc
flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
msgbuf->tx_pktids, idx);
- if (!skb) {
- brcmf_err("Invalid packet id idx recv'd %d\n", idx);
+ if (!skb)
return;
- }
set_bit(flowid, msgbuf->txstatus_done_map);
commonring = msgbuf->flowrings[flowid];
@@ -1148,6 +1144,8 @@ brcmf_msgbuf_process_rx_complete(struct
skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
msgbuf->rx_pktids, idx);
+ if (!skb)
+ return;
if (data_offset)
skb_pull(skb, data_offset);

63
package/kernel/mac80211/patches/374-brcmfmac-fix-invalid-access-to-struct-acpi_device-fi.patch Normal file
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From: Arend van Spriel <arend@broadcom.com>
Date: Wed, 27 May 2015 19:31:41 +0200
Subject: [PATCH] brcmfmac: fix invalid access to struct acpi_device fields
The fields of struct acpi_device are only known when CONFIG_ACPI is
defined. Fix this by using a helper function. This will resolve the
issue found in linux-next:
../brcmfmac/bcmsdh.c: In function 'brcmf_ops_sdio_probe':
../brcmfmac/bcmsdh.c:1139:7: error: dereferencing pointer to incomplete type
adev->flags.power_manageable = 0;
^
Fixes: f0992ace680c ("brcmfmac: prohibit ACPI power management ...")
Cc: Fu, Zhonghui <zhonghui.fu@linux.intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
@@ -1117,6 +1117,18 @@ MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_id
static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
+static void brcmf_sdiod_acpi_set_power_manageable(struct device *dev,
+ int val)
+{
+#if IS_ENABLED(CONFIG_ACPI)
+ struct acpi_device *adev;
+
+ adev = ACPI_COMPANION(dev);
+ if (adev)
+ adev->flags.power_manageable = 0;
+#endif
+}
+
static int brcmf_ops_sdio_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
@@ -1124,7 +1136,6 @@ static int brcmf_ops_sdio_probe(struct s
struct brcmf_sdio_dev *sdiodev;
struct brcmf_bus *bus_if;
struct device *dev;
- struct acpi_device *adev;
brcmf_dbg(SDIO, "Enter\n");
brcmf_dbg(SDIO, "Class=%x\n", func->class);
@@ -1132,11 +1143,9 @@ static int brcmf_ops_sdio_probe(struct s
brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
brcmf_dbg(SDIO, "Function#: %d\n", func->num);
- /* prohibit ACPI power management for this device */
dev = &func->dev;
- adev = ACPI_COMPANION(dev);
- if (adev)
- adev->flags.power_manageable = 0;
+ /* prohibit ACPI power management for this device */
+ brcmf_sdiod_acpi_set_power_manageable(dev, 0);
/* Consume func num 1 but dont do anything with it. */
if (func->num == 1)

56
package/kernel/mac80211/patches/375-brcmfmac-simplify-check-stripping-v2-NVRAM.patch Normal file
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@@ -0,0 +1,56 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Wed, 20 May 2015 09:34:21 +0200
Subject: [PATCH] brcmfmac: simplify check stripping v2 NVRAM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Comparing NVRAM entry with a full filtering string is simpler than
comparing it with a short prefix and then checking random chars at magic
offsets. The cost of snprintf relatively low, we execute it just once.
Tested on BCM43602 with NVRAM hacked to use V2 format.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
--- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
@@ -25,7 +25,7 @@
#define BRCMF_FW_MAX_NVRAM_SIZE 64000
#define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */
-#define BRCMF_FW_NVRAM_PCIEDEV_LEN 9 /* pcie/1/4/ */
+#define BRCMF_FW_NVRAM_PCIEDEV_LEN 10 /* pcie/1/4/ + \0 */
char brcmf_firmware_path[BRCMF_FW_PATH_LEN];
module_param_string(firmware_path, brcmf_firmware_path,
@@ -297,6 +297,8 @@ fail:
static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr,
u16 bus_nr)
{
+ char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN];
+ size_t len;
u32 i, j;
u8 *nvram;
@@ -308,14 +310,13 @@ static void brcmf_fw_strip_multi_v2(stru
* Valid entries are of type pcie/X/Y/ where X = domain_nr and
* Y = bus_nr.
*/
+ snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr);
+ len = strlen(prefix);
i = 0;
j = 0;
- while (i < nvp->nvram_len - BRCMF_FW_NVRAM_PCIEDEV_LEN) {
- if ((strncmp(&nvp->nvram[i], "pcie/", 5) == 0) &&
- (nvp->nvram[i + 6] == '/') && (nvp->nvram[i + 8] == '/') &&
- ((nvp->nvram[i + 5] - '0') == domain_nr) &&
- ((nvp->nvram[i + 7] - '0') == bus_nr)) {
- i += BRCMF_FW_NVRAM_PCIEDEV_LEN;
+ while (i < nvp->nvram_len - len) {
+ if (strncmp(&nvp->nvram[i], prefix, len) == 0) {
+ i += len;
while (nvp->nvram[i] != 0) {
nvram[j] = nvp->nvram[i];
i++;

57
package/kernel/mac80211/patches/376-brcmfmac-simplify-check-finding-NVRAM-v1-device-path.patch Normal file
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@@ -0,0 +1,57 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Wed, 20 May 2015 11:01:08 +0200
Subject: [PATCH] brcmfmac: simplify check finding NVRAM v1 device path
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
With a simple use of snprintf and small buffer we can compare NVRAM
entry value with a full string. This way we avoid checking random chars
at magic offsets.
Tested on BCM43602 with NVRAM hacked to use v1 format.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
--- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
@@ -222,6 +222,10 @@ static int brcmf_init_nvram_parser(struc
static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr,
u16 bus_nr)
{
+ /* Device path with a leading '=' key-value separator */
+ char pcie_path[] = "=pcie/?/?";
+ size_t pcie_len;
+
u32 i, j;
bool found;
u8 *nvram;
@@ -238,6 +242,9 @@ static void brcmf_fw_strip_multi_v1(stru
/* First search for the devpathX and see if it is the configuration
* for domain_nr/bus_nr. Search complete nvp
*/
+ snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr,
+ bus_nr);
+ pcie_len = strlen(pcie_path);
found = false;
i = 0;
while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) {
@@ -245,13 +252,10 @@ static void brcmf_fw_strip_multi_v1(stru
* Y = domain_nr, Z = bus_nr, X = virtual ID
*/
if ((strncmp(&nvp->nvram[i], "devpath", 7) == 0) &&
- (strncmp(&nvp->nvram[i + 8], "=pcie/", 6) == 0)) {
- if (((nvp->nvram[i + 14] - '0') == domain_nr) &&
- ((nvp->nvram[i + 16] - '0') == bus_nr)) {
- id = nvp->nvram[i + 7] - '0';
- found = true;
- break;
- }
+ (strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len) == 0)) {
+ id = nvp->nvram[i + 7] - '0';
+ found = true;
+ break;
}
while (nvp->nvram[i] != 0)
i++;

45
package/kernel/mac80211/patches/377-brcmfmac-treat-0-as-end-of-comment-when-parsing-NVRA.patch Normal file
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@@ -0,0 +1,45 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Wed, 20 May 2015 13:59:54 +0200
Subject: [PATCH] brcmfmac: treat \0 as end of comment when parsing NVRAM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This fixes brcmfmac dealing with NVRAM coming from platform e.g. from a
flash MTD partition. In such cases entries are separated by \0 instead
of \n which caused ignoring whole content after the first "comment".
While platform NVRAM doesn't usually contain comments, we switch to
COMMENT state after e.g. finding an unexpected char in key name.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
--- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
@@ -162,17 +162,20 @@ brcmf_nvram_handle_value(struct nvram_pa
static enum nvram_parser_state
brcmf_nvram_handle_comment(struct nvram_parser *nvp)
{
- char *eol, *sol;
+ char *eoc, *sol;
sol = (char *)&nvp->fwnv->data[nvp->pos];
- eol = strchr(sol, '\n');
- if (eol == NULL)
- return END;
+ eoc = strchr(sol, '\n');
+ if (!eoc) {
+ eoc = strchr(sol, '\0');
+ if (!eoc)
+ return END;
+ }
/* eat all moving to next line */
nvp->line++;
nvp->column = 1;
- nvp->pos += (eol - sol) + 1;
+ nvp->pos += (eoc - sol) + 1;
return IDLE;
}