brcmsmac: do a read after the write of the objmem on broken PCIe controllers
authorHauke Mehrtens <hauke@hauke-m.de>
Fri, 7 Dec 2012 16:04:13 +0000 (17:04 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 10 Dec 2012 20:47:30 +0000 (15:47 -0500)
commit512ae05611179e6e98a48b5ddc4d263b7eb8a587
tree28d9b88f9ed9857dc70eced7cd0a34e79e0f20fd
parent4f7dc951e2dad489fb89b03d3f968d3a229dc9ec
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 <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/brcm80211/brcmsmac/main.c