commit 5f6aa03fda2a0a79940765865c1e4266be8a75f8 USB: Fix complaints about strict aliasing in OHCI-HCD
tried to fix this, but gcc4.4 still complains. So, this patch basically reverts the above and does a simpler fix.
also, the above commit incorrectly changed /* corresponds to data_buf[4-7] */ datab [1] = 0; to
/* corresponds to databuf.u8[4-7] */ databuf.u8[1] = 0;
This patch also fixes that.
Signed-off-by: Troy Kisky troy.kisky@boundarydevices.com --- drivers/usb/host/ohci-hcd.c | 70 +++++++++++++++++++------------------------ 1 file changed, 31 insertions(+), 39 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index d24f2f1..9f47351 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1261,19 +1261,11 @@ static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe, int leni = transfer_len; int len = 0; int stat = 0; - __u32 datab[4]; - union { - void *ptr; - __u8 *u8; - __u16 *u16; - __u32 *u32; - } databuf; __u16 bmRType_bReq; __u16 wValue; __u16 wIndex; __u16 wLength; - - databuf.u32 = (__u32 *)datab; + ALLOC_ALIGN_BUFFER(__u8, databuf, 16, sizeof(u32));
#ifdef DEBUG pkt_print(NULL, dev, pipe, buffer, transfer_len, @@ -1304,20 +1296,20 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, */
case RH_GET_STATUS: - databuf.u16[0] = cpu_to_le16(1); + *(u16 *)databuf = cpu_to_le16(1); OK(2); case RH_GET_STATUS | RH_INTERFACE: - databuf.u16[0] = cpu_to_le16(0); + *(u16 *)databuf = cpu_to_le16(0); OK(2); case RH_GET_STATUS | RH_ENDPOINT: - databuf.u16[0] = cpu_to_le16(0); + *(u16 *)databuf = cpu_to_le16(0); OK(2); case RH_GET_STATUS | RH_CLASS: - databuf.u32[0] = cpu_to_le32( + *(u32 *)databuf = cpu_to_le32( RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE)); OK(4); case RH_GET_STATUS | RH_OTHER | RH_CLASS: - databuf.u32[0] = cpu_to_le32(RD_RH_PORTSTAT); + *(u32 *)databuf = cpu_to_le32(RD_RH_PORTSTAT); OK(4);
case RH_CLEAR_FEATURE | RH_ENDPOINT: @@ -1381,14 +1373,14 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, min_t(unsigned int, sizeof(root_hub_dev_des), wLength)); - databuf.ptr = root_hub_dev_des; OK(len); + databuf = root_hub_dev_des; OK(len); case (0x02): /* configuration descriptor */ len = min_t(unsigned int, leni, min_t(unsigned int, sizeof(root_hub_config_des), wLength)); - databuf.ptr = root_hub_config_des; OK(len); + databuf = root_hub_config_des; OK(len); case (0x03): /* string descriptors */ if (wValue == 0x0300) { len = min_t(unsigned int, @@ -1396,7 +1388,7 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, min_t(unsigned int, sizeof(root_hub_str_index0), wLength)); - databuf.ptr = root_hub_str_index0; + databuf = root_hub_str_index0; OK(len); } if (wValue == 0x0301) { @@ -1405,7 +1397,7 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, min_t(unsigned int, sizeof(root_hub_str_index1), wLength)); - databuf.ptr = root_hub_str_index1; + databuf = root_hub_str_index1; OK(len); } default: @@ -1417,40 +1409,40 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, { __u32 temp = roothub_a(&gohci);
- databuf.u8[0] = 9; /* min length; */ - databuf.u8[1] = 0x29; - databuf.u8[2] = temp & RH_A_NDP; + databuf[0] = 9; /* min length; */ + databuf[1] = 0x29; + databuf[2] = temp & RH_A_NDP; #ifdef CONFIG_AT91C_PQFP_UHPBUG - databuf.u8[2] = (databuf.u8[2] == 2) ? 1 : 0; + databuf[2] = (databuf[2] == 2) ? 1 : 0; #endif - databuf.u8[3] = 0; + databuf[3] = 0; if (temp & RH_A_PSM) /* per-port power switching? */ - databuf.u8[3] |= 0x1; + databuf[3] |= 0x1; if (temp & RH_A_NOCP) /* no overcurrent reporting? */ - databuf.u8[3] |= 0x10; + databuf[3] |= 0x10; else if (temp & RH_A_OCPM)/* per-port overcurrent reporting? */ - databuf.u8[3] |= 0x8; + databuf[3] |= 0x8;
- /* corresponds to databuf.u8[4-7] */ - databuf.u8[1] = 0; - databuf.u8[5] = (temp & RH_A_POTPGT) >> 24; + databuf[4] = 0; + databuf[5] = (temp & RH_A_POTPGT) >> 24; + databuf[6] = 0; temp = roothub_b(&gohci); - databuf.u8[7] = temp & RH_B_DR; - if (databuf.u8[2] < 7) { - databuf.u8[8] = 0xff; + databuf[7] = temp & RH_B_DR; + if (databuf[2] < 7) { + databuf[8] = 0xff; } else { - databuf.u8[0] += 2; - databuf.u8[8] = (temp & RH_B_DR) >> 8; - databuf.u8[10] = databuf.u8[9] = 0xff; + databuf[0] += 2; + databuf[8] = (temp & RH_B_DR) >> 8; + databuf[10] = databuf[9] = 0xff; }
len = min_t(unsigned int, leni, - min_t(unsigned int, databuf.u8[0], wLength)); + min_t(unsigned int, databuf[0], wLength)); OK(len); }
case RH_GET_CONFIGURATION: - databuf.u8[0] = 0x01; + databuf[0] = 0x01; OK(1);
case RH_SET_CONFIGURATION: @@ -1469,8 +1461,8 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, #endif
len = min_t(int, len, leni); - if (data != databuf.ptr) - memcpy(data, databuf.ptr, len); + if (data != databuf) + memcpy(data, databuf, len); dev->act_len = len; dev->status = stat;