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powerpc/pseries: Add failure related checks for h_get_mpp and h_get_ppp

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[ Upstream commit 6d4341638516bf97b9a34947e0bd95035a8230a5 ]

Couple of Minor fixes:

- hcall return values are long. Fix that for h_get_mpp, h_get_ppp and
parse_ppp_data

- If hcall fails, values set should be at-least zero. It shouldn't be
uninitialized values. Fix that for h_get_mpp and h_get_ppp

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240412092047.455483-3-sshegde@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shrikanth Hegde
2024-04-12 14:50:47 +05:30
committed by Greg Kroah-Hartman
parent a2d61b328e
commit 12ea1ec137
3 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/include/asm/hvcall.h
View File

@@ -494,7 +494,7 @@ struct hvcall_mpp_data {
unsigned long backing_mem; unsigned long backing_mem;
}; };
int h_get_mpp(struct hvcall_mpp_data *); long h_get_mpp(struct hvcall_mpp_data *mpp_data);
struct hvcall_mpp_x_data { struct hvcall_mpp_x_data {
unsigned long coalesced_bytes; unsigned long coalesced_bytes;

6
arch/powerpc/platforms/pseries/lpar.c
View File

@@ -1883,10 +1883,10 @@ out:
* h_get_mpp * h_get_mpp
* H_GET_MPP hcall returns info in 7 parms * H_GET_MPP hcall returns info in 7 parms
*/ */
int h_get_mpp(struct hvcall_mpp_data *mpp_data) long h_get_mpp(struct hvcall_mpp_data *mpp_data)
{ {
int rc; unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; long rc;
rc = plpar_hcall9(H_GET_MPP, retbuf); rc = plpar_hcall9(H_GET_MPP, retbuf);

6
arch/powerpc/platforms/pseries/lparcfg.c
View File

@@ -112,8 +112,8 @@ struct hvcall_ppp_data {
*/ */
static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
{ {
unsigned long rc; unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; long rc;
rc = plpar_hcall9(H_GET_PPP, retbuf); rc = plpar_hcall9(H_GET_PPP, retbuf);
@@ -192,7 +192,7 @@ static void parse_ppp_data(struct seq_file *m)
struct hvcall_ppp_data ppp_data; struct hvcall_ppp_data ppp_data;
struct device_node *root; struct device_node *root;
const __be32 *perf_level; const __be32 *perf_level;
int rc; long rc;
rc = h_get_ppp(&ppp_data); rc = h_get_ppp(&ppp_data);
if (rc) if (rc)