From: Hauke Mehrtens Date: Fri, 7 Dec 2012 16:04:13 +0000 (+0100) Subject: brcmsmac: do a read after the write of the objmem on broken PCIe controllers X-Git-Tag: v5.15~21098^2~17^2~29 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=512ae05611179e6e98a48b5ddc4d263b7eb8a587;p=platform%2Fkernel%2Flinux-starfive.git brcmsmac: do a read after the write of the objmem on broken PCIe controllers As described in the documentation of bcma_wflush16 in drivers/net /wireless/brcm80211/brcmsmac/types.h some PCIe controllers of Broadcom SoCs are broken. The PCIe controller on these SoCs are mostly used to connect some additional wifi device to the SoC and some of these wifi devices are supported by brcmsmac. For my BCM43224 connected to the broken PCIe controller of the BCM4718 I need an extra read after write in brcms_b_write_objmem() to prevent a Data bus error. This fixes the problem reading tsf_random later. Signed-off-by: Hauke Mehrtens Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/brcm80211/brcmsmac/main.c b/drivers/net/wireless/brcm80211/brcmsmac/main.c index cb48fc4..2599cd0 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/main.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c @@ -2920,7 +2920,7 @@ brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset, u16 v, if (offset & 2) objoff += 2; - bcma_write16(core, objoff, v); + bcma_wflush16(core, objoff, v); } /*