From: Janusz Krzysztofik <[email protected]> In its current form, the omap_mcbsp_request() function can return after irq_request() failure without any cleanups, effectively locking out the port forever with clocks left running. Fix it.
Signed-off-by: Janusz Krzysztofik <[email protected]> Acked-by: Jarkko Nikula <[email protected]> Acked-by: Peter Ujfalusi <[email protected]> Signed-off-by: Tony Lindgren <[email protected]> --- arch/arm/plat-omap/mcbsp.c | 20 +++++++++++++++++--- 1 files changed, 17 insertions(+), 3 deletions(-) diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index 2cc1cc3..f757672 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -436,7 +436,7 @@ int omap_mcbsp_request(unsigned int id) dev_err(mcbsp->dev, "Unable to request TX IRQ %d " "for McBSP%d\n", mcbsp->tx_irq, mcbsp->id); - return err; + goto error; } init_completion(&mcbsp->rx_irq_completion); @@ -446,12 +446,26 @@ int omap_mcbsp_request(unsigned int id) dev_err(mcbsp->dev, "Unable to request RX IRQ %d " "for McBSP%d\n", mcbsp->rx_irq, mcbsp->id); - free_irq(mcbsp->tx_irq, (void *)mcbsp); - return err; + goto tx_irq; } } return 0; +tx_irq: + free_irq(mcbsp->tx_irq, (void *)mcbsp); +error: + if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free) + mcbsp->pdata->ops->free(id); + + /* Do procedure specific to omap34xx arch, if applicable */ + omap34xx_mcbsp_free(mcbsp); + + clk_disable(mcbsp->fclk); + clk_disable(mcbsp->iclk); + + mcbsp->free = 1; + + return err; } EXPORT_SYMBOL(omap_mcbsp_request); -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
