On Wed, 2016-03-09 at 11:23 -0500, Jes Sorensen wrote:
> NeilBrown <neilb@xxxxxxx> writes:
> >
> > On Wed, Mar 09 2016, Jes.Sorensen@xxxxxxxxxx wrote:
> >
> > >
> > > From: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
> > >
> > > The code did not free 'dir' allocated by opendir(). An additional
> > > benefit is that this simplifies the for() loops.
> > >
> > > Fixes: 60f0f54d ("IMSM: Add support for VMD")
> > > Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
> > > ---
> > > platform-intel.c | 7 ++++++-
> > > super-intel.c | 6 +++++-
> > > 2 files changed, 11 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/platform-intel.c b/platform-intel.c
> > > index 88818f3..c60fd9e 100644
> > > --- a/platform-intel.c
> > > +++ b/platform-intel.c
> > > @@ -724,8 +724,10 @@ char *vmd_domain_to_controller(struct sys_dev *hba, char *buf)
> > > return NULL;
> > >
> > > dir = opendir("/sys/bus/pci/drivers/vmd");
> > > + if (!dir)
> > > + return NULL;
> > >
> > > - for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
> > > + for (ent = readdir(dir); ent; ent = readdir(dir)) {
> > > sprintf(path, "/sys/bus/pci/drivers/vmd/%s/domain/device",
> > > ent->d_name);
> > >
> > > @@ -734,8 +736,11 @@ char *vmd_domain_to_controller(struct sys_dev *hba, char *buf)
> > >
> > > if (strncmp(buf, hba->path, strlen(buf)) == 0) {
> > > sprintf(path, "/sys/bus/pci/drivers/vmd/%s", ent->d_name);
> > > + closedir(dir);
> > > return realpath(path, buf);
> > > }
> > > }
> > > +
> > > + closedir(dir);
> > > return NULL;
> > > }
> > > diff --git a/super-intel.c b/super-intel.c
> > > index 158f4e8..e1bee75 100644
> > > --- a/super-intel.c
> > > +++ b/super-intel.c
> > > @@ -1781,7 +1781,10 @@ static int print_vmd_attached_devs(struct sys_dev *hba)
> > > * this hba
> > > */
> > > dir = opendir("/sys/bus/pci/drivers/nvme");
> > > - for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
> > > + if (!dir)
> > > + return 1;
> > > +
> > Returning '1' looks really weird here. I can see it is consistent with
> > if (hba->type != SYS_DEV_VMD)
> > return 1;
> >
> > above, but still....
> > As the return value is never used, should we just make it 'void' ??
> Seems reasonable - I'll put that in a separate patch.
>
> Cheers,
> Jes
Hello,
Thanks for the fix Jes.
I thinks that instead of making it "void" we can actually check the return value and print a proper message if something goes wrong.
Also "simplified for() loop" can be applied to ahci_enumerate_ports() as well.
@@ -1624,7 +1624,10 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
* this hba
*/
dir = opendir("/sys/dev/block");
- for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
+ if (!dir)
+ return 1;
+
+ for (ent = readdir(dir); ent; ent = readdir(dir)) {
int fd;
char model[64];
char vendor[64];
@@ -2021,7 +2024,11 @@ static int detail_platform_imsm(int verbose, int enumerate_only, char *controlle
print_imsm_capability(&entry->orom);
printf(" I/O Controller : %s (%s)\n",
vmd_domain_to_controller(hba, buf), get_sys_dev_type(hba->type));
- print_vmd_attached_devs(hba);
+ if (print_vmd_attached_devs(hba)) {
+ if (verbose > 0)
+ pr_err("failed to get devices attached to VMD domain.\n");
+ result |= 2;
+ }
printf("\n");
}
}
Is that ok with you? Should I prepare a proper patch with this?
Thanks,
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