linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
	Jason Cooper <jason@lakedaemon.net>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH] PCI: mvebu: Fix uninitialized variable in mvebu_get_tgt_attr()
Date: Fri,  8 Aug 2014 17:34:05 +0200	[thread overview]
Message-ID: <1407512045-26969-1-git-send-email-geert+renesas@glider.be> (raw)

drivers/pci/host/pci-mvebu.c: In function 'mvebu_get_tgt_attr':
drivers/pci/host/pci-mvebu.c:887:39: warning: 'rtype' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (slot == PCI_SLOT(devfn) && type == rtype) {
                                       ^

If there's ever gonna be a configuration space or 64-bit memory space
entry in DT, rtype will be uninitialized, and the wrong entry may be
returned.

Initialize rtype to 0 (which is an unused IORESOURCE_* type) to fix this.

Introduced in commit 11be65472a427dcf7a11ab6e3e3628f1c6768b5b ("PCI:
mvebu: Adapt to the new device tree layout").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Alternatively, should the "else if (DT_FLAGS_TO_TYPE(flags) ==
DT_TYPE_MEM32)" just be changed to "else", assuming there can never be
other entries than for I/O or 32-bit memory space?
---
 drivers/pci/host/pci-mvebu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index ce23e0f076b6..9515f0d13fd4 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -877,7 +877,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
 		u32 flags = of_read_number(range, 1);
 		u32 slot = of_read_number(range + 1, 1);
 		u64 cpuaddr = of_read_number(range + na, pna);
-		unsigned long rtype;
+		unsigned long rtype = 0;
 
 		if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
 			rtype = IORESOURCE_IO;
-- 
1.9.1


             reply	other threads:[~2014-08-08 15:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-08 15:34 Geert Uytterhoeven [this message]
2014-09-05 17:41 ` Bjorn Helgaas
2014-09-05 17:51   ` Arnd Bergmann
2014-09-05 18:20   ` Thomas Petazzoni
2014-09-05 18:34     ` Arnd Bergmann
2014-09-05 19:00       ` Bjorn Helgaas
2014-09-16 23:17         ` Bjorn Helgaas
2014-09-17 15:58 Thomas Petazzoni
2014-09-22 20:43 ` Bjorn Helgaas

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1407512045-26969-1-git-send-email-geert+renesas@glider.be \
    --to=geert+renesas@glider.be \
    --cc=bhelgaas@google.com \
    --cc=jason@lakedaemon.net \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=thomas.petazzoni@free-electrons.com \
    --subject='Re: [PATCH] PCI: mvebu: Fix uninitialized variable in mvebu_get_tgt_attr()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).