6.6-stable review patch. If anyone has any objections, please let me know.
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From: Junhao He hejunhao3@huawei.com
[ Upstream commit 862c135bde8bc185e8aae2110374175e6a1b6ed5 ]
In smb_reset_buffer, the sdb->buf_hw_base variable is uninitialized before use, which initializes it in smb_init_data_buffer. And the SMB regiester are set in smb_config_inport. So move the call after smb_config_inport.
Fixes: 06f5c2926aaa ("drivers/coresight: Add UltraSoc System Memory Buffer driver") Signed-off-by: Junhao He hejunhao3@huawei.com Reviewed-by: James Clark james.clark@arm.com Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Link: https://lore.kernel.org/r/20231114133346.30489-4-hejunhao3@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwtracing/coresight/ultrasoc-smb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/ultrasoc-smb.c b/drivers/hwtracing/coresight/ultrasoc-smb.c index 2f2aba90a5148..6e32d31a95fe0 100644 --- a/drivers/hwtracing/coresight/ultrasoc-smb.c +++ b/drivers/hwtracing/coresight/ultrasoc-smb.c @@ -477,7 +477,6 @@ static int smb_init_data_buffer(struct platform_device *pdev, static void smb_init_hw(struct smb_drv_data *drvdata) { smb_disable_hw(drvdata); - smb_reset_buffer(drvdata);
writel(SMB_LB_CFG_LO_DEFAULT, drvdata->base + SMB_LB_CFG_LO_REG); writel(SMB_LB_CFG_HI_DEFAULT, drvdata->base + SMB_LB_CFG_HI_REG); @@ -587,6 +586,7 @@ static int smb_probe(struct platform_device *pdev) if (ret) return ret;
+ smb_reset_buffer(drvdata); platform_set_drvdata(pdev, drvdata); spin_lock_init(&drvdata->spinlock); drvdata->pid = -1;