[PATCH RFC 30/38] powerpc/pseries/lparcfg: return h_get_ppp()'s status as a long

[Christian Brauner]

h_get_ppp() returns the status of the H_GET_PPP hcall as an unsigned
int. update_ppp() hands it on as its ssize_t result, and
lparcfg_write() turns the hcall statuses it knows into an errno and
returns anything else as it is. So when H_GET_PPP fails, say with
H_PARAMETER (-4), the status comes back as 4294967292 and a write to
/proc/powerpc/lparcfg reports that many bytes written.

Return the status as the long it is. lparcfg_write() then treats it
like the status of H_SET_PPP and an unknown one is at least negative.
Before commit 11529396ea31 ("powerpc/pseries: Split processor
entitlement retrieval and gathering to helper routines") a failed
H_GET_PPP turned into -EIO.

Reported-by: Chris Mason <mason@xxxxxxxxxx>
Fixes: 11529396ea31 ("powerpc/pseries: Split processor entitlement retrieval and gathering to helper routines")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>
---
 arch/powerpc/platforms/pseries/lparcfg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
index 3280b7968cab..aa9b5b141434 100644
--- a/arch/powerpc/platforms/pseries/lparcfg.c
+++ b/arch/powerpc/platforms/pseries/lparcfg.c
@@ -113,7 +113,7 @@ struct hvcall_ppp_data {
  *	          XXXXXX - Entitled procs capacity % available to the
  *			   partitions pool.
  */
-static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
+static long h_get_ppp(struct hvcall_ppp_data *ppp_data)
 {
 	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
 	long rc;

-- 
2.53.0