[PATCH 1/1] virt: arm-cca-guest: fix error check for RSI_INCOMPLETE

[Sami Mujawar]

The RSI interface can return RSI_INCOMPLETE when a report spans
multiple granules. This is an expected condition and should not be
treated as a fatal error.

Currently, arm_cca_report_new() checks for `info.result != RSI_SUCCESS`
and bails out, which incorrectly flags RSI_INCOMPLETE as a failure.
Fix the check to only break out on results other than RSI_SUCCESS or
RSI_INCOMPLETE.

This ensures partial reports are handled correctly and avoids spurious
-ENXIO errors when generating attestation reports.

Fixes: 7999edc484ca ("virt: arm-cca-guest: TSM_REPORT support for realms")
Signed-off-by: Sami Mujawar <sami.mujawar at arm.com>
Reported-by: Jagdish Gediya <Jagdish.Gediya at arm.com>
---
 drivers/virt/coco/arm-cca-guest/arm-cca-guest.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c b/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c
index 0c9ea24a200c..66d00b6ceb78 100644
--- a/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c
+++ b/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c
@@ -157,7 +157,8 @@ static int arm_cca_report_new(struct tsm_report *report, void *data)
 		} while (info.result == RSI_INCOMPLETE &&
 			 info.offset < RSI_GRANULE_SIZE);
 
-		if (info.result != RSI_SUCCESS) {
+		/* Break out in case of failure */
+		if (info.result != RSI_SUCCESS && info.result != RSI_INCOMPLETE) {
 			ret = -ENXIO;
 			token_size = 0;
 			goto exit_free_granule_page;
-- 
SAMI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}