From: Roland Vossen Date: Tue, 23 Aug 2011 12:13:59 +0000 (+0200) Subject: staging: brcm80211: bugfix for fifo problem on 64 bits platforms. X-Git-Tag: firefly_0821_release~3680^2~4313^2^2~864^2~266 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c13d2ad0599a73d87871c5a2b4468e8cbd4bf369;p=firefly-linux-kernel-4.4.55.git staging: brcm80211: bugfix for fifo problem on 64 bits platforms. Message 'receive fifo overflow' appeared in the log. Root cause was an invalid physical address being programmed into the DMA engine. This was caused by an invalid pointer cast in the dma code. Issue was observed on a Sparc (Sun Fire V120) machine but could theoretically also pop up on other architectures. Driver was tested to scan and ping on aforementioned machine. Reviewed-by: Arend van Spriel Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Arend van Spriel Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/brcm80211/brcmsmac/dma.c b/drivers/staging/brcm80211/brcmsmac/dma.c index 2ef416a9558e..05dad9fcc931 100644 --- a/drivers/staging/brcm80211/brcmsmac/dma.c +++ b/drivers/staging/brcm80211/brcmsmac/dma.c @@ -600,13 +600,18 @@ static bool _dma_alloc(struct dma_info *di, uint direction) void *dma_alloc_consistent(struct pci_dev *pdev, uint size, u16 align_bits, uint *alloced, unsigned long *pap) { + void *rc; + dma_addr_t dma_addr; + if (align_bits) { u16 align = (1 << align_bits); if (!IS_ALIGNED(PAGE_SIZE, align)) size += align; *alloced = size; } - return pci_alloc_consistent(pdev, size, (dma_addr_t *) pap); + rc = pci_alloc_consistent(pdev, size, &dma_addr); + *pap = dma_addr; + return rc; } /* !! may be called with core in reset */