hwmon/w83781d: Drop REALLY_SLOW_IO setting

In w83781d_isa_found() there is REALLY_SLOW_IO defined around some port
accesses, probably in order to wait between multiple accesses.

Unfortunately this isn't making any difference compared to not having
this define since more than a decade, as REALLY_SLOW_IO needs to be
defined while "#include <asm/io.h>" is called to have an effect.

As there seem not to be any outstanding issues in spite of this having
no effect, just drop the "#define" and add a remark to the related
comment.

Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20251126162018.5676-4-jgross@suse.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 076200ed2ec914ab34ac1760042f39b7977385de..f664c2152a6deebc5e4fcd7adda2a090637cbc88 100644 (file)
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1850,10 +1850,12 @@ w83781d_isa_found(unsigned short address)
                }
        }
 
-#define REALLY_SLOW_IO
        /*
         * We need the timeouts for at least some W83781D-like
         * chips. But only if we read 'undefined' registers.
+        * There used to be a "#define REALLY_SLOW_IO" to enforce that, but
+        * this has been without any effect since more than a decade, so it
+        * has been dropped.
         */
        val = inb_p(address + 1);
        if (inb_p(address + 2) != val
@@ -1862,7 +1864,6 @@ w83781d_isa_found(unsigned short address)
                pr_debug("Detection failed at step %d\n", 1);
                goto release;
        }
-#undef REALLY_SLOW_IO
 
        /*
         * We should be able to change the 7 LSB of the address port. The