Patch "spi: dw: Disable clock after unregistering the host" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

spi: dw: Disable clock after unregistering the host

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
spi-dw-disable-clock-after-unregistering-the-host.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Marek Vasut <[email protected]>
Date: Tue, 18 Apr 2017 20:09:06 +0200
Subject: spi: dw: Disable clock after unregistering the host

From: Marek Vasut <[email protected]>

[ Upstream commit 400c18e3dc86e04ef5afec9b86a8586ca629b9e9 ]

The dw_mmio driver disables the block clock before unregistering the host. The code unregistering the host may access the SPI block registers. If register access happens with block clock disabled, this may lead to a bus hang. Disable the clock after unregistering the host to prevent such situation.

This bug was observed on Altera Cyclone V SoC.

---
 drivers/spi/spi-dw-mmio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -115,8 +115,8 @@ static int dw_spi_mmio_remove(struct pla
 {
 	struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev);
 
-	clk_disable_unprepare(dwsmmio->clk);
 	dw_spi_remove_host(&dwsmmio->dws);
+	clk_disable_unprepare(dwsmmio->clk);
 
 	return 0;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/spi-dw-disable-clock-after-unregistering-the-host.patch