[PATCH] 2.5.62: /proc/ide/via reads return incomplete data, Bug #374

[Faik Uygur]

This patch fixes the incomplete data return problem of /proc/ide/via and 
addresses Bug #374 of Bugzilla.

When the number of consecutive read bytes are smaller than the total data 
in via_get_info(), the second read() returns 0.

--- linux-2.5.62-vanilla/drivers/ide/pci/via82cxxx.c    Thu Feb 20 18:51:52 2003
+++ linux-2.5.62/drivers/ide/pci/via82cxxx.c    Thu Feb 20 23:09:23 2003
@@ -145,6 +145,7 @@
                 uen[4], udma[4], umul[4], active8b[4], recover8b[4];
        struct pci_dev *dev = bmide_dev;
        unsigned int v, u, i;
+       int len;
        u16 c, w;
        u8 t, x;
        char *p = buffer;
@@ -274,7 +275,10 @@
                speed[i] / 1000, speed[i] / 100 % 10);

        /* hoping it is less than 4K... */
-       return p - buffer;
+       len = (p - buffer) - offset;
+       *addr = buffer + offset;
+
+       return len > count ? count : len;
 }

 #endif /* DISPLAY_VIA_TIMINGS && CONFIG_PROC_FS */