From: Alan Stern Date: Tue, 24 Jan 2012 16:58:15 +0000 (-0500) Subject: USB: OHCI: fix new compiler warnings X-Git-Tag: v3.3-rc2~5^2~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=194b3af4eb4b7ba84e2e4274daf9f58aa958bd04;p=platform%2Fkernel%2Flinux-exynos.git USB: OHCI: fix new compiler warnings This patch (as1515) fixes some unavoidably dumb compiler warnings: CC [M] drivers/usb/renesas_usbhs/mod.o In file included from drivers/usb/host/ohci-hcd.c:101:0: drivers/usb/host/ohci-dbg.c: In function ‘fill_registers_buffer’: drivers/usb/host/ohci-dbg.c:656:2: warning: the comparison will always evaluate as ‘true’ for the address of ‘next’ will never be NULL [-Waddress] drivers/usb/host/ohci-dbg.c:675:3: warning: the comparison will always evaluate as ‘true’ for the address of ‘next’ will never be NULL [-Waddress] Instead of trying to fix the macro to work under all cirumstances, just add a second macro for use in cases where the "next" argument is the address of a local variable. Unfortunately the macro cannot be replaced by a real subroutine, because there's no va_list version of ohci_dbg() or dev_dbg(). Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ohci-dbg.c b/drivers/usb/host/ohci-dbg.c index 5179fcd..e4bcb62 100644 --- a/drivers/usb/host/ohci-dbg.c +++ b/drivers/usb/host/ohci-dbg.c @@ -82,6 +82,14 @@ urb_print(struct urb * urb, char * str, int small, int status) ohci_dbg(ohci,format, ## arg ); \ } while (0); +/* Version for use where "next" is the address of a local variable */ +#define ohci_dbg_nosw(ohci, next, size, format, arg...) \ + do { \ + unsigned s_len; \ + s_len = scnprintf(*next, *size, format, ## arg); \ + *size -= s_len; *next += s_len; \ + } while (0); + static void ohci_dump_intr_mask ( struct ohci_hcd *ohci, @@ -653,7 +661,7 @@ static ssize_t fill_registers_buffer(struct debug_buffer *buf) /* dump driver info, then registers in spec order */ - ohci_dbg_sw (ohci, &next, &size, + ohci_dbg_nosw(ohci, &next, &size, "bus %s, device %s\n" "%s\n" "%s\n", @@ -672,7 +680,7 @@ static ssize_t fill_registers_buffer(struct debug_buffer *buf) /* hcca */ if (ohci->hcca) - ohci_dbg_sw (ohci, &next, &size, + ohci_dbg_nosw(ohci, &next, &size, "hcca frame 0x%04x\n", ohci_frame_no(ohci)); /* other registers mostly affect frame timings */