diff options
| author | Hante Meuleman <meuleman@broadcom.com> | 2015-01-25 22:31:31 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2015-01-29 10:58:54 +0300 |
| commit | 69d03ee0b709a282f81e9f81c1359cffe1edcd2b (patch) | |
| tree | 454532da01623c1e81b2f6fbacf2df8dc164cb02 /drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | |
| parent | 5ef1e604194ee629c5d9fd6b9a4d3c424cfd2a84 (diff) | |
| download | linux-69d03ee0b709a282f81e9f81c1359cffe1edcd2b.tar.xz | |
brcmfmac: prevent possible deadlock on resuming SDIO device.
When the system is resumed a deadlock can occur when DPC gets
entered before resume is complete. This patch fixes this by
properly checking the suspend state outside the claim_host code
block.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index 00ba90b89455..8ba60f6f4915 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c @@ -97,25 +97,6 @@ static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func) { } -static bool brcmf_sdiod_pm_resume_error(struct brcmf_sdio_dev *sdiodev) -{ - bool is_err = false; -#ifdef CONFIG_PM_SLEEP - is_err = atomic_read(&sdiodev->suspend); -#endif - return is_err; -} - -static void brcmf_sdiod_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, - wait_queue_head_t *wq) -{ -#ifdef CONFIG_PM_SLEEP - int retry = 0; - while (atomic_read(&sdiodev->suspend) && retry++ != 30) - wait_event_timeout(*wq, false, HZ/100); -#endif -} - int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev) { int ret = 0; @@ -244,10 +225,6 @@ static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn, brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n", write, fn, addr, regsz); - brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait); - if (brcmf_sdiod_pm_resume_error(sdiodev)) - return -EIO; - /* only allow byte access on F0 */ if (WARN_ON(regsz > 1 && !fn)) return -EINVAL; @@ -462,10 +439,6 @@ static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, unsigned int req_sz; int err; - brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait); - if (brcmf_sdiod_pm_resume_error(sdiodev)) - return -EIO; - /* Single skb use the standard mmc interface */ req_sz = pkt->len + 3; req_sz &= (uint)~3; @@ -516,10 +489,6 @@ static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn, if (!pktlist->qlen) return -EINVAL; - brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait); - if (brcmf_sdiod_pm_resume_error(sdiodev)) - return -EIO; - target_list = pktlist; /* for host with broken sg support, prepare a page aligned list */ __skb_queue_head_init(&local_list); @@ -1077,8 +1046,6 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func, #endif atomic_set(&sdiodev->suspend, false); - init_waitqueue_head(&sdiodev->request_word_wait); - init_waitqueue_head(&sdiodev->request_buffer_wait); brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n"); err = brcmf_sdiod_probe(sdiodev); |