linux-kernel - [PATCH 4.4 148/149] drm/radeon: fix fb_div check in ni_init_smc_spll

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Message-Id: <20200820092132.860036377@linuxfoundation.org>
Date:   Thu, 20 Aug 2020 11:23:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Denis Efremov <efremov@...ux.com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.4 148/149] drm/radeon: fix fb_div check in ni_init_smc_spll_table()

From: Denis Efremov <efremov@...ux.com>

commit f29aa08852e1953e461f2d47ab13c34e14bc08b3 upstream.

clk_s is checked twice in a row in ni_init_smc_spll_table().
fb_div should be checked instead.

Fixes: 69e0b57a91ad ("drm/radeon/kms: add dpm support for cayman (v5)")
Cc: stable@...r.kernel.org
Signed-off-by: Denis Efremov <efremov@...ux.com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/ni_dpm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/ni_dpm.c
+++ b/drivers/gpu/drm/radeon/ni_dpm.c
@@ -2125,7 +2125,7 @@ static int ni_init_smc_spll_table(struct
 		if (p_div & ~(SMC_NISLANDS_SPLL_DIV_TABLE_PDIV_MASK >> SMC_NISLANDS_SPLL_DIV_TABLE_PDIV_SHIFT))
 			ret = -EINVAL;
 
-		if (clk_s & ~(SMC_NISLANDS_SPLL_DIV_TABLE_CLKS_MASK >> SMC_NISLANDS_SPLL_DIV_TABLE_CLKS_SHIFT))
+		if (fb_div & ~(SMC_NISLANDS_SPLL_DIV_TABLE_FBDIV_MASK >> SMC_NISLANDS_SPLL_DIV_TABLE_FBDIV_SHIFT))
 			ret = -EINVAL;
 
 		if (fb_div & ~(SMC_NISLANDS_SPLL_DIV_TABLE_FBDIV_MASK >> SMC_NISLANDS_SPLL_DIV_TABLE_FBDIV_SHIFT))