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Date: Tue, 26 Feb 2019 11:23:34 +0200 From: Oded Gabbay <oded.gabbay@...il.com> To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, dan.carpenter@...cle.com, rppt@...ux.ibm.com Subject: [PATCH] habanalabs: return error when failing to read/write i2c The driver can't read/write from i2c if the device is in reset or disabled. Therefore, return -EBUSY in those cases instead of 0. This change also fixes a smatch warning about uninitialized variable. Reported-by: Dan Carpenter <dan.carpenter@...cle.com> Signed-off-by: Oded Gabbay <oded.gabbay@...il.com> --- drivers/misc/habanalabs/debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c index a6d9d809385e..f472b572faea 100644 --- a/drivers/misc/habanalabs/debugfs.c +++ b/drivers/misc/habanalabs/debugfs.c @@ -25,7 +25,7 @@ static int hl_debugfs_i2c_read(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr, int rc; if (hl_device_disabled_or_in_reset(hdev)) - return 0; + return -EBUSY; memset(&pkt, 0, sizeof(pkt)); @@ -50,7 +50,7 @@ static int hl_debugfs_i2c_write(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr, int rc; if (hl_device_disabled_or_in_reset(hdev)) - return 0; + return -EBUSY; memset(&pkt, 0, sizeof(pkt)); -- 2.17.1
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