ARM: OMAP2+: Fix broken gpmc support

Commit 6797b4fe (ARM: OMAP2+: Prevent potential crash if GPMC probe fails)
added code to ensure that GPMC chip-selects could not be requested until the
device probe was successful. The chip-selects should have been
unreserved at the end of the probe function, but the code to unreserve
them appears to have ended up in the gpmc_calc_timings() function and
hence, this is causing problems requesting chip-selects. Fix this merge
error by unreserving the chip-selects at the end of the probe, but
before we call the gpmc child probe functions (for device-tree) which
request a chip-select.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Philip Avinash <avinashphilip@ti.com>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
[tony@atomide.com: updated description to add breaking commit id]
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index e4b16c8..410e1ba 100644 (file)
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -1122,9 +1122,6 @@ int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
        /* TODO: remove, see function definition */
        gpmc_convert_ps_to_ns(gpmc_t);
 
-       /* Now the GPMC is initialised, unreserve the chip-selects */
-       gpmc_cs_map = 0;
-
        return 0;
 }
 
@@ -1383,6 +1380,9 @@ static int gpmc_probe(struct platform_device *pdev)
        if (IS_ERR_VALUE(gpmc_setup_irq()))
                dev_warn(gpmc_dev, "gpmc_setup_irq failed\n");
 
+       /* Now the GPMC is initialised, unreserve the chip-selects */
+       gpmc_cs_map = 0;
+
        rc = gpmc_probe_dt(pdev);
        if (rc < 0) {
                clk_disable_unprepare(gpmc_l3_clk);