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Commit 49984844 authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by Ian Maund
Browse files

wil6210: fix race in reset 



It is important to halt USER CPU first, then MAC CPU
Otherwise, race happens in the firmware

Change-Id: Id181624e31441d8e7c245cca79f8796f261a0f38
Signed-off-by: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
Git-commit: cc9e4a2b667c79d531a79c5eede27d11c1394326
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


Signed-off-by: default avatarHamad Kadmany <hkadmany@codeaurora.org>
parent c333bd4a

drivers/net/wireless/ath/wil6210/main.c

+4 −1
Original line number Diff line number Diff line
@@ -327,6 +327,8 @@ static void wil_target_reset(struct wil6210_priv *wil) 
	/* register clear = read, AND with inverted, write */

#define C(a, v) W(a, R(a) & ~v)



	wmb(); /* If host reorder writes here -> race in NIC */

	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */

	wil->hw_version = R(RGF_USER_FW_REV_ID);

	rev_id = wil->hw_version & 0xff;
@@ -343,8 +345,9 @@ static void wil_target_reset(struct wil6210_priv *wil) 
		wmb(); /* order is important here */

	}



	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */

	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */

	wmb(); /* If host reorder writes here -> race in NIC */

	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */

	wmb(); /* order is important here */



	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);