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firmware: arm_scmi: Fix sparse warnings in OPTEE transport driver

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The sparse checker complains about converting pointers between address
spaces.  We correctly stored an __iomem pointer in struct scmi_optee_channel,
but discarded the __iomem when returning it from get_channel_shm, causing one
warning. Then we passed the non-__iomem pointer return from get_channel_shm
at two other places, where an __iomem pointer is expected, causing couple of
other warnings

Add the appropriate __iomem annotations at all places where it is missing.

optee.c:414:20: warning: incorrect type in return expression (different address spaces)
optee.c:414:20:    expected struct scmi_shared_mem *
optee.c:414:20:    got struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:426:26: warning: incorrect type in argument 1 (different address spaces)
optee.c:426:26:    expected struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:426:26:    got struct scmi_shared_mem *shmem
optee.c:441:30: warning: incorrect type in argument 1 (different address spaces)
optee.c:441:30:    expected struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:441:30:    got struct scmi_shared_mem *shmem

Link: https://lore.kernel.org/r/20220404102419.1159705-1-sudeep.holla@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla 2022-04-04 11:24:19 +01:00
parent f1ad601d1f
commit bf36619a54
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/firmware/arm_scmi/optee.c
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@ -405,8 +405,8 @@ static int scmi_optee_chan_free(int id, void *p, void *data)
return 0; return 0;
} }
static struct scmi_shared_mem *get_channel_shm(struct scmi_optee_channel *chan, static struct scmi_shared_mem __iomem *
struct scmi_xfer *xfer) get_channel_shm(struct scmi_optee_channel *chan, struct scmi_xfer *xfer)
{ {
if (!chan) if (!chan)
return NULL; return NULL;
@ -419,7 +419,7 @@ static int scmi_optee_send_message(struct scmi_chan_info *cinfo,
struct scmi_xfer *xfer) struct scmi_xfer *xfer)
{ {
struct scmi_optee_channel *channel = cinfo->transport_info; struct scmi_optee_channel *channel = cinfo->transport_info;
struct scmi_shared_mem *shmem = get_channel_shm(channel, xfer); struct scmi_shared_mem __iomem *shmem = get_channel_shm(channel, xfer);
int ret; int ret;
mutex_lock(&channel->mu); mutex_lock(&channel->mu);
@ -436,7 +436,7 @@ static void scmi_optee_fetch_response(struct scmi_chan_info *cinfo,
struct scmi_xfer *xfer) struct scmi_xfer *xfer)
{ {
struct scmi_optee_channel *channel = cinfo->transport_info; struct scmi_optee_channel *channel = cinfo->transport_info;
struct scmi_shared_mem *shmem = get_channel_shm(channel, xfer); struct scmi_shared_mem __iomem *shmem = get_channel_shm(channel, xfer);
shmem_fetch_response(shmem, xfer); shmem_fetch_response(shmem, xfer);
} }