hwmon/lm78: Drop REALLY_SLOW_IO setting

In lm78_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/20251126162018.5676-3-jgross@suse.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c
index 8b53bb3120693e8175c603e1f4e6da854fc355a9..9378a47bf5afa988e23b0982ea1e70dd0e272ed4 100644 (file)
--- a/drivers/hwmon/lm78.c
+++ b/drivers/hwmon/lm78.c
@@ -843,17 +843,18 @@ static int __init lm78_isa_found(unsigned short address)
                }
        }
 
-#define REALLY_SLOW_IO
        /*
         * We need the timeouts for at least some LM78-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
         || inb_p(address + 3) != val
         || inb_p(address + 7) != val)
                goto release;
-#undef REALLY_SLOW_IO
 
        /*
         * We should be able to change the 7 LSB of the address port. The