diff options
| author | Kangjie Lu <kjlu@umn.edu> | 2019-03-15 08:19:03 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-09-23 11:16:23 +0300 |
| commit | 8da96730331dab78e7194c5af48efbcf90264d02 (patch) | |
| tree | 8d9296c88dce045248d480b18f12d97325136cb0 /drivers/net/wireless/ath/ath10k/core.c | |
| parent | 40f4ef5e92326ab127bdeb6f024855c8c91de608 (diff) | |
| download | linux-8da96730331dab78e7194c5af48efbcf90264d02.tar.xz | |
ath10k: fix missing checks for bmi reads and writes
ath10k_bmi_write32 and ath10k_bmi_read32 can fail. The fix
checks their statuses to avoid potential undefined behaviors.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/core.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/core.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 383d4fa555a8..3d91a4025cfc 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -677,13 +677,22 @@ static void ath10k_send_suspend_complete(struct ath10k *ar) complete(&ar->target_suspend); } -static void ath10k_init_sdio(struct ath10k *ar, enum ath10k_firmware_mode mode) +static int ath10k_init_sdio(struct ath10k *ar, enum ath10k_firmware_mode mode) { + int ret; u32 param = 0; - ath10k_bmi_write32(ar, hi_mbox_io_block_sz, 256); - ath10k_bmi_write32(ar, hi_mbox_isr_yield_limit, 99); - ath10k_bmi_read32(ar, hi_acs_flags, ¶m); + ret = ath10k_bmi_write32(ar, hi_mbox_io_block_sz, 256); + if (ret) + return ret; + + ret = ath10k_bmi_write32(ar, hi_mbox_isr_yield_limit, 99); + if (ret) + return ret; + + ret = ath10k_bmi_read32(ar, hi_acs_flags, ¶m); + if (ret) + return ret; /* Data transfer is not initiated, when reduced Tx completion * is used for SDIO. disable it until fixed @@ -700,14 +709,23 @@ static void ath10k_init_sdio(struct ath10k *ar, enum ath10k_firmware_mode mode) else param |= HI_ACS_FLAGS_SDIO_SWAP_MAILBOX_SET; - ath10k_bmi_write32(ar, hi_acs_flags, param); + ret = ath10k_bmi_write32(ar, hi_acs_flags, param); + if (ret) + return ret; /* Explicitly set fwlog prints to zero as target may turn it on * based on scratch registers. */ - ath10k_bmi_read32(ar, hi_option_flag, ¶m); + ret = ath10k_bmi_read32(ar, hi_option_flag, ¶m); + if (ret) + return ret; + param |= HI_OPTION_DISABLE_DBGLOG; - ath10k_bmi_write32(ar, hi_option_flag, param); + ret = ath10k_bmi_write32(ar, hi_option_flag, param); + if (ret) + return ret; + + return 0; } static int ath10k_init_configure_target(struct ath10k *ar) @@ -2565,8 +2583,13 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode, if (status) goto err; - if (ar->hif.bus == ATH10K_BUS_SDIO) - ath10k_init_sdio(ar, mode); + if (ar->hif.bus == ATH10K_BUS_SDIO) { + status = ath10k_init_sdio(ar, mode); + if (status) { + ath10k_err(ar, "failed to init SDIO: %d\n", status); + goto err; + } + } } ar->htc.htc_ops.target_send_suspend_complete = |