linux-kernel - [PATCH 3.16 176/357] spi: dw-pci: fix bug when regs left uninitialized

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Date:	Fri,  3 Oct 2014 14:29:22 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Mark Brown <broonie@...aro.org>
Subject: [PATCH 3.16 176/357] spi: dw-pci: fix bug when regs left uninitialized

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

commit c9d5d6fe168fd45a4dfdd0116affe708789b4702 upstream.

The commit 04f421e7 "spi: dw: use managed resources" changes drivers to use
managed functions, but seems wasn't properly tested in PCI case. The regs field
of struct dw_spi left uninitialized. Thus, kernel crashes when tries to access
to the SPI controller registers. This patch fixes the issue.

Fixes: 04f421e7 (spi: dw: use managed resources)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/spi/spi-dw-pci.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -62,6 +62,8 @@ static int spi_pci_probe(struct pci_dev
 	if (ret)
 		return ret;
 
+	dws->regs = pcim_iomap_table(pdev)[pci_bar];
+
 	dws->bus_num = 0;
 	dws->num_cs = 4;
 	dws->irq = pdev->irq;


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