diff options
| author | Amitkumar Karwar <akarwar@marvell.com> | 2017-01-24 19:05:45 +0530 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2017-01-28 09:10:04 +0200 |
| commit | cc37d8efd2ba3a4cf395a727935f920c00b6f1a2 (patch) | |
| tree | 43131ae631b12d93cc23465bcb2912318e4c104e /drivers/net/wireless/marvell | |
| parent | 3e66849865edca1d04c9c6227b9153e9bdbdaec0 (diff) | |
| download | talos-obmc-linux-cc37d8efd2ba3a4cf395a727935f920c00b6f1a2.tar.gz talos-obmc-linux-cc37d8efd2ba3a4cf395a727935f920c00b6f1a2.zip | |
mwifiex: use pci_dma_sync_single* APIs
On some platforms, driver is unable read sleep cookie signature even
if firmware has written it through DMA. The problem is fixed by using
pci_dma_sync_single* APIs while reading DMA buffer shared with firmware.
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/marvell')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/pcie.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index 3f4ca28356ac..a0d918094889 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -439,9 +439,14 @@ static void mwifiex_delay_for_sleep_cookie(struct mwifiex_adapter *adapter, struct pcie_service_card *card = adapter->card; u8 *buffer; u32 sleep_cookie, count; + struct sk_buff *cmdrsp = card->cmdrsp_buf; for (count = 0; count < max_delay_loop_cnt; count++) { - buffer = card->cmdrsp_buf->data; + pci_dma_sync_single_for_cpu(card->dev, + MWIFIEX_SKB_DMA_ADDR(cmdrsp), + sizeof(sleep_cookie), + PCI_DMA_FROMDEVICE); + buffer = cmdrsp->data; sleep_cookie = READ_ONCE(*(u32 *)buffer); if (sleep_cookie == MWIFIEX_DEF_SLEEP_COOKIE) { @@ -449,6 +454,10 @@ static void mwifiex_delay_for_sleep_cookie(struct mwifiex_adapter *adapter, "sleep cookie found at count %d\n", count); break; } + pci_dma_sync_single_for_device(card->dev, + MWIFIEX_SKB_DMA_ADDR(cmdrsp), + sizeof(sleep_cookie), + PCI_DMA_FROMDEVICE); usleep_range(20, 30); } |
