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ahci: Don't start command DMA engine before buffers are set 

The DMA/FIS buffers are set in ahci_port_start() which is called
after ahci_host_init(). So don't start the DMA engine here
(i.e. don't set FIS_RX)

This fixes the following error at kernel boot on OMAP platforms (e.g. DRA7x)
WARNING: CPU: 0 PID: 0 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x260/0x358()
44000000.ocp:L3 Custom Error: MASTER SATA TARGET GPMC (Idle): Data Access in User mode during Functional access

Signed-off-by: Roger Quadros <rogerq@ti.com>
This commit is contained in:
Roger Quadros 2014-09-23 18:07:01 +03:00 committed by Tom Rini
parent 115e71f7da
commit 02590aa31c
1 changed files with 0 additions and 1 deletions
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drivers/block/ahci.c
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@ -229,7 +229,6 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
* already be on in the command register.
*/
cmd = readl(port_mmio + PORT_CMD);
cmd |= PORT_CMD_FIS_RX;
cmd |= PORT_CMD_SPIN_UP;
writel_with_flush(cmd, port_mmio + PORT_CMD);