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

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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
This commit is contained in:
Shrikanth Hegde 2024-04-12 14:50:47 +05:30 committed by Michael Ellerman
parent 9c74ecfd0f
commit 6d43416385
3 changed files with 7 additions and 7 deletions
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2
arch/powerpc/include/asm/hvcall.h
View File

@ -570,7 +570,7 @@ struct hvcall_mpp_data {
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 {
unsigned long coalesced_bytes;

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

@ -1886,10 +1886,10 @@ out:
* h_get_mpp
* 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];
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
long rc;
rc = plpar_hcall9(H_GET_MPP, retbuf);

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

@ -113,8 +113,8 @@ struct hvcall_ppp_data {
*/
static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
{
unsigned long rc;
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
long rc;
rc = plpar_hcall9(H_GET_PPP, retbuf);
@ -197,7 +197,7 @@ static void parse_ppp_data(struct seq_file *m)
struct hvcall_ppp_data ppp_data;
struct device_node *root;
const __be32 *perf_level;
int rc;
long rc;
rc = h_get_ppp(&ppp_data);
if (rc)