On 02/06/2017 10:59 AM, Shivasharan S wrote:
> Fix kernel warning for accessing unaligned memory access in driver.
>
> Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@xxxxxxxxxxxx>
> Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
> ---
> drivers/scsi/megaraid/megaraid_sas_base.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
> index c38b9c3..907b2bf 100644
> --- a/drivers/scsi/megaraid/megaraid_sas_base.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_base.c
> @@ -43,6 +43,7 @@
> #include <linux/uio.h>
> #include <linux/slab.h>
> #include <linux/uaccess.h>
> +#include <asm/unaligned.h>
> #include <linux/fs.h>
> #include <linux/compat.h>
> #include <linux/blkdev.h>
> @@ -7002,7 +7003,8 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
> sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
> ioc->sense_off);
>
> - if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
> + if (copy_to_user((void __user *)((unsigned long)
> + get_unaligned((unsigned long *)sense_ptr)),
> sense, ioc->sense_len)) {
> dev_err(&instance->pdev->dev, "Failed to copy out to user "
> "sense data\n");
>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@xxxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, D. Upmanyu, G. Norton
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