diff options
| author | Sebastian Andrzej Siewior | 2012-10-30 19:52:25 +0100 |
|---|---|---|
| committer | Felipe Balbi | 2012-10-31 14:22:03 +0100 |
| commit | af5ec14d40e0da1de17fcca2b41c76fae5c2cb9d (patch) | |
| tree | 0bdfddd642e2455e34ece3a5551038a470db61f1 /drivers/usb/musb/musb_core.h | |
| parent | usb: musb: avoid FADDR read access (diff) | |
| download | kernel-qcow2-linux-af5ec14d40e0da1de17fcca2b41c76fae5c2cb9d.tar.gz kernel-qcow2-linux-af5ec14d40e0da1de17fcca2b41c76fae5c2cb9d.tar.xz kernel-qcow2-linux-af5ec14d40e0da1de17fcca2b41c76fae5c2cb9d.zip | |
usb: musb: Perform only write access on MUSB_INTRRXE
This is part of the workaround for AM35x advisory Advisory 1.1.20.
The advisory says that the IPSS bridge can't handle 8 & 16 bit read
access. An 16bit read access to MUSB_INTRRXE results in an 32bit read
access which also reads INTRUSB and therefore may lose interrupts.
This patch uses a shadow register of MUSB_INTRRXE so we only perform
write access to it.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_core.h')
| -rw-r--r-- | drivers/usb/musb/musb_core.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index c158aacd6de8..60b92cbdc7f7 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -288,7 +288,7 @@ struct musb_csr_regs { struct musb_context_registers { u8 power; - u16 intrtxe, intrrxe; + u16 intrtxe; u8 intrusbe; u16 frame; u8 index, testmode; @@ -313,6 +313,7 @@ struct musb { struct work_struct irq_work; u16 hwvers; + u16 intrrxe; /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */ #define MUSB_PORT_STAT_RESUME (1 << 31) |